User blog comment:MeeperCreep/Who's my better Mega Pokemon?/@comment-31722743-20170713150928

Both of them aren't very good. Both Gengar and Lucario have pretty piss poor movesets that make them pretty situational and predictable. You don't need status moves like Hypnosis to sweep, and you don't need special moves like Dragon Pulse either.

You need coverage.

Both of these are powerful pokemon in their own right, but you aren't utilizing them properly. Give them both moves that support their higher attacking stat, like giving Bone Rush to Lucario or Shadow Ball to Gengar.

If you want my honest opinion of which mega is better, though. Right now, I'd have to say Mega Gengar, since Lucario's nature and IVs make me want to vomit, and Gengar's IVs actually don't look half bad.